Can I set up my SouthESIM for Monaco after I cross the border?

We highly recommend setting up your SouthESIM for Monaco before you cross the border. The border between France (like Cap-d'Ail or Beausoleil) and Monaco is often just a street, and your French signal could drop abruptly. By activating your SouthESIM beforehand, your phone will automatically switch to the local Monaco network as soon as you enter, giving you immediate, stress-free connectivity for navigating the Principality or sharing your first impressions.